package com.serenegiant.utils;
/*
 * libcommon
 * utility/helper classes for myself
 *
 * Copyright (c) 2014-2018 saki t_saki@serenegiant.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

import android.annotation.SuppressLint;
import android.os.Build;
import android.os.SystemClock;

public class Time {

    public static boolean prohibitElapsedRealtimeNanos = true;

    private static Time sTime;

    static {
        reset();
    }

    public static long nanoTime() {
        return sTime.timeNs();
    }

    public static void reset() {
        if (!prohibitElapsedRealtimeNanos && Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            sTime = new TimeJellyBeanMr1();
        } else {
            sTime = new Time();
        }
    }

    private Time() {
    }

    private static class TimeJellyBeanMr1 extends Time {
        public long timeNs() {
            return SystemClock.elapsedRealtimeNanos();
        }
    }

    protected long timeNs() {
        return System.nanoTime();
    }
}
